Reviewed By librado r (LAYTON, UT) Reviewed for a 1999 Ford Expedition —3/24/2011 9:15 PM
i like how my truck takes off more easy with less gas and the rpm is lower in idle.
Reviewed By John P (Galt, CA) Reviewed for a 2003 Ford Expedition —5/12/2010 7:29 AM
The spacer was simple to install. the instructions could provide a simple drawing for the very inexperienced. It does not whistle as I drive (I read this from another review). I have not noticed a significant amount of power. The on board computer averages fuel consumption while on the freeway cursing at 1999 RPM's in overdrive the average went from 17 MPG to 19 MPG, ( it could have been great tail wind). I have only had it installed a week now and have driven 300 miles.. So far it seems to be a good product. John